492 



Journal of Agricultural Research 



Vol. XXII, No. 4 



selected for the measure of germinative energy and final germination 

 were as follows: 



Engelmann spruce . . 



Dou^^las fir 



Lodgepole pine 



Western yellow pine. 



White pine 



Western white pine.. 



The germinative energy periods were selected through the use of the 

 germination curves as the guide. Other investigators may not agree 

 with these periods, and the writer will admit that other lots of seeds 

 might indicate periods of different length. The period of final germi- 

 nation is the same as that shown in Table I for the year 1910. It was 

 necessary for comparative results to select a period not longer than 

 that over which the tests were conducted in any one of the four years. 

 The tests were discontinued sooner in 19 10 than in any other year, and 

 this led to the selection of the test period during that year. 



Table II. — Quality of seed after storage for i, 2, j, and 5 years 



Species. 



Picea engelmanni . 



Pinus ponderosa. 



Pin us contorta. 



Paper bag 



Paper bag paraffined . 



Cloth bag 



Cloth bag oiled 



Bottle air-tight 



Paper bag 



Paper bag paraffined . 



Cloth bag 



Cloth bag oiled 



Bottle air-tight 



Paper bag 



Paper bag paraffined . 



Cloth bag 



Cloth bag oiled 



Bottle air-tight 



Paper bag 



Paper bag paraffined . 



Cloth bag 



Cloth bag oiled 



j Bottle air-tight 



Pinus strobus , Paper bag 



Paper bag paraffined . 



I Cloth bag 



j Cloth bag oiled 



I Bottle air-tight 



Pinus monticola Paper bag 



Paper bag paraffined . 



Cloth bag 



i Cloth bag oiled 



• Bottle air-tight 



Pseudotsuga iaxifolia. 



Container. 



Quality expressed in percentage after stor- 

 age for — 



I year. 



42. O 

 44.2 

 35-6 

 26. o 

 66.6 

 52.2 

 53- 8 

 .54-9 

 36-4 

 64.8 



59- o 

 66.4 



44-7 

 15. o 

 70.4 

 20.8 

 26.0 

 15.0 

 6.8 



46.3 

 29.9 



32-9 

 24. o 

 17.0 

 49.6 



] years. 



19-3 



33.8 

 38.6 

 26.8 



19-3 

 76.6 

 39-8 

 41. o 

 39-6 



39-7 

 58.0 



.54-3 

 55-2 

 47-4 

 17.8 



73-9 

 II. 2 

 14. 6 

 8.8 

 5-2 

 47. 2 



13-2 



13.6 



7.8 



5-8 



26.6 



17.8 



18.2 



9.4 



7.8 



16.6 



3 years. 



11. 7 



12. 4 



5 

 55 



27' 



39 

 38, 

 26, 

 46, 



33-^ 

 37-6 

 27. 7 

 13-3 

 56.3 

 2.8 



3-3 

 2. 2 

 .6 

 32.4 

 3-0 

 4.2 



14.8 

 3-2 



2.4 



1.6 



1-4 

 2.9 



S years 



5-4 



6 6 



4 4 



3-6 



35- o 



33-4 



35.8 



21- 5 



20. I 



47-5 



36. I 



33.8 



ig. 3 



9-9 



55. 3 



•5 



•9 



•5 



. 3 



27. 6 



30 



2-5 



3. 2 



.8 



22. 6 



3- r 

 4-4 

 3. 2 



I- 5 

 17.3 



